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Song W, Feng Y, Zhang J, Kong D, Fan J, Zhao M, Hua L, Xiang J, Tang X, Xiao S, Peng Z, Wu B. Development of a multiplex reverse transcription-quantitative PCR (qPCR) method for detecting common causative agents of swine viral diarrhea in China. Porcine Health Manag 2024; 10:12. [PMID: 38444040 PMCID: PMC10916220 DOI: 10.1186/s40813-024-00364-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/25/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Diarrheal diseases caused by viral agents have led to a great morbidity, mortality, and economic loss in global pig industry. Porcine epidemic diarrhea virus (PEDV), transmissible gastroenteritis virus (TGEV), porcine deltacoronavirus (PDCoV), and group A porcine rotavirus (RVA) are main causative agents of swine viral diarrhea with similar clinical signs on Chinese farms and their co-infection is also common. However, it is still lack of a convenient method to detect these four agents. METHODS A TaqMan multiplex qPCR method was developed to detect PEDV, TGEV, PDCoV, and RVA, simultaneously. This method was then applied to investigate 7,342 swine fecal samples or rectal swabs, as well as 1,246 swine intestinal samples collected from 2075 farms in China in 2022. RESULTS Minimum detection limits of this method were 3 copies/µL for PEDV, 4 copies/µL for TGEV, 8 copies/µL for RVA, and 8 copies/µL for PDCoV, suggesting a good sensitivity. No signals were observed by using this method detecting other viral agents commonly prevalent in pigs, which is suggestive of a good specificity. Application of this method on investigating clinical samples demonstrated a relatively high positive rate for PEDV (22.21%, 1907/8588) and RVA (44.00%, 3779/8588). In addition, co-infection between PEDV and RVA was observed on 360 investigated farms, accounting for 17.35% (360/2075) of the farms where co-infection events were screened. CONCLUSIONS A TaqMan multiplex qPCR method targeting PEDV, TGEV, PDCoV, and RVA was developed in this study. This method demonstrated a good specificity and sensitivity on investigating these four common viruses responsible for viral diarrhea on Chinese pig farms, which represents a convenient method for the monitoring and differential diagnosis of swine viral diarrhea.
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Affiliation(s)
- Wenbo Song
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, China
- Hubei Hongshan Laboratory, 430070, Wuhan, China
- Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, 430070, Wuhan, China
| | - Yixue Feng
- Animal Disease Diagnosis Center of Wuhan Keqian Biology Co., Ltd, 430070, Wuhan, China
| | - Jiali Zhang
- Animal Disease Diagnosis Center of Wuhan Keqian Biology Co., Ltd, 430070, Wuhan, China
| | - Danni Kong
- Animal Disease Diagnosis Center of Wuhan Keqian Biology Co., Ltd, 430070, Wuhan, China
| | - Jie Fan
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, China
- Hubei Hongshan Laboratory, 430070, Wuhan, China
- Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, 430070, Wuhan, China
| | - Mengfei Zhao
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, China
- Hubei Hongshan Laboratory, 430070, Wuhan, China
- Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, 430070, Wuhan, China
| | - Lin Hua
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, China
- Hubei Hongshan Laboratory, 430070, Wuhan, China
- Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, 430070, Wuhan, China
| | - Jinmei Xiang
- Hubei Vocational College of Bio-Technology, 430070, Wuhan, China
| | - Xibiao Tang
- Animal Disease Diagnosis Center of Wuhan Keqian Biology Co., Ltd, 430070, Wuhan, China
- Hubei Vocational College of Bio-Technology, 430070, Wuhan, China
| | - Shaobo Xiao
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, China
- Hubei Hongshan Laboratory, 430070, Wuhan, China
- Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, 430070, Wuhan, China
| | - Zhong Peng
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, China.
- Hubei Hongshan Laboratory, 430070, Wuhan, China.
- Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, 430070, Wuhan, China.
| | - Bin Wu
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, China.
- Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, 430070, Wuhan, China.
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Hong Y, Ma B, Li J, Shuai J, Zhang X, Xu H, Zhang M. Triplex-Loop-Mediated Isothermal Amplification Combined with a Lateral Flow Immunoassay for the Simultaneous Detection of Three Pathogens of Porcine Viral Diarrhea Syndrome in Swine. Animals (Basel) 2023; 13:1910. [PMID: 37370420 DOI: 10.3390/ani13121910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/29/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Porcine epidemic diarrhea virus (PEDV), porcine bocavirus (PBoV), and porcine rotavirus (PoRV) are associated with porcine viral diarrhea. In this study, triplex loop-mediated isothermal amplification (LAMP) combined with a lateral flow dipstick (LFD) was established for the simultaneous detection of PEDV, PoRV, and PBoV. The PEDV-gp6, PoRV-vp6, and PBoV-vp1 genes were selected to design LAMP primers. The amplification could be carried out at 64 °C using a miniature metal bath within 30 min. The triplex LAMP-LFD assay exhibited no cross-reactions with other porcine pathogens. The limits of detection (LODs) of PEDV, PoRV, and PBoV were 2.40 × 101 copies/μL, 2.89 × 101 copies/μL, and 2.52 × 101 copies/μL, respectively. The consistency between rt-qPCR and the triplex LAMP-LFD was over 99% in field samples testing. In general, the triplex LAMP-LFD assay was suitable for the rapid and simultaneous detection of the three viruses in the field.
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Affiliation(s)
- Yi Hong
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, China Jiliang University, Hangzhou 310018, China
| | - Biao Ma
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, China Jiliang University, Hangzhou 310018, China
| | - Jiali Li
- Hangzhou Quickgene Sci-Tech. Co., Ltd., Hangzhou 310018, China
| | - Jiangbing Shuai
- Zhejiang Academy of Science and Technology for Inspection and Quarantine, Hangzhou 310016, China
| | - Xiaofeng Zhang
- Zhejiang Academy of Science and Technology for Inspection and Quarantine, Hangzhou 310016, China
| | - Hanyue Xu
- College of Life Science, China Jiliang University, Hangzhou 310018, China
| | - Mingzhou Zhang
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, China Jiliang University, Hangzhou 310018, China
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